the battery next to the intake manifold. Actually I think it tees off with the passenger side AIV first then it goes to the AIV solenoid. So find that T and plug it into that. There's a vacuum line coming out of the passenger side fender just like the one that you have that comes out of the drivers side fender. Find it and follow it to the T and plug the drivers side into it. This pic only shows you what the solenoid looks like.